Comet Tempel-Tuttle is a periodic comet that orbits the Sun approximately every 33 years. It was discovered independently by Heinrich Wilhelm Olbers in 1858 and Eugène Charles Cheseaux in 1865. The comet is known for its bright appearance and long tail, which can be seen when it approaches the Sun. This comet is the parent body of the Leonid meteor shower, which occurs annually in November. As Earth passes through the debris left by Tempel-Tuttle, tiny particles enter the atmosphere and create bright streaks of light. The last close approach of the comet was in 1998, and it is expected to return in 2031.